<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>练习1</title>
</head>
<body>
<script>
  var arr = ['a','b','c','d'];
  for(k in arr){
    console.log(arr[k])
  }
</script>
</body>
</html>


<template>
    <div>
        <button @click="decrement">-</button>
        <input type="number" v-model="count">
        <button @click="increment">+</button>
    </div>
</template>



<style>
</style>
